Turret.



FfMcR. BAWDEN.

TURRET.

APPLICATION FILED mmzs. 1918.

Patented July 9, 1918.

3 SHEETS-SHEET I.

F. McR. BAWDEN.

TURRET.

APPLICATION FILED JAN. 26. l9l8.

3 SHEETS-SHEET 2.

fim/lzlor 70m. 3M

Patented July 9, 1918.

F. McR. BAWDEN.

TURRET.

APPLICATLON FILED um. 26. 1913.

1 ,272, 1 88. Patented July 9, 1918.

3 SHEETS-SHEET a.

OFFIC.

FRED McRAE BawDEn, or'ronoiwro, ONTARIO, CANADA.

= murmur.

Specificationof Letters Patent.

Patented July 9, 1918.

Application filed January 26, 191s. Serial No. 214,019.

To all whom it may concern: 7

Be it known that I, FRED MoRAE BAWDEN, a subject of the King of Great:Britain, rcsiding. in the city ofoToronto, county of York, Province ofOntario, Canada, have invented certain new and useful Improve:

ments in Turrets, of which the following is a specification.

My invention relates .toimprovements in.

turrets, and the objects of my invention are: first, to produce ahorizontal revolvmg turret provided with a plurality of bars whichsup,-. port the cutters firmly so that true deep borings may be made andwhereby consecutive-operations may be carried out without loss oftimeand impairment in accuracy of work; second, to provide a; convenient:sup-. port for the boring-barrel carrymgthe bars,

so that this barrel may be readily manipulated and locked in position,and so that the cutter in operation will be rigidly heldwith thelongitudinal center of its supporting bar 1 in alinement. withthelongitudinal center of r the lathe-spindle; third, to providesuitableindexing-means whereby the i desired. cutter can be readily located inworking position prior. to locking, andv fourth, to; provide suitablemeans for moving the1b0ring-barrel to change the cutters. V I v I Thepreferred form of my invention and .a'suitable mounting therefor will behereinafter particularly set forth, and what I claim as new will bepointed out in. theclaims forming part of this specification.

. Figure 1. is a side elevation of my turret.

showing the-same movably mounted on a 551 necessary that the walls ofthe. bore be ab:

machine bed, part of which isshown in.

side elevation. Fig.- 2 is an end elevation of my turret showingparticularly the indexing andmovin-g and locking means for theyboring-barrel. Thisview also shows an end.

elevation of a suitable machine-bed supporting the turret. Fig. 3 is anend elevation of mountingmeans for the boring-bar1'el,.and Figml is aside elevation thereof; Fig.5 is a side elevation-of the boring-barrehportion of one platebeing shown in section, and.

Figs. 6 and 7 are end elevations of the boring-barrel.. In the drawings,like characters of'reference refer to'the same parts. i

It is, well-known that in making many deep borings, particularly inconnection with the manufacture ofvshells, it is absolutely machine inactual daily use, it has been abundantly proven that I have succeeded inattaining the object in View.

My turret comprises a boring-barrel A, the preferred form of whichcomprises end circular plates B and. C, connected together by a hub D.The said plates together with the said hub are preferably cored toreduce 1 weight, and without sacrificing strength. The saldboring-barrel is mounted to hOIlzontally rotate within the splitstandards E v and E, which are carried by any suitable support F, whichin the preferred form of invention is in the form of a carriage which ismounted to move longitudinally on any suitable machine bed G. The plateB is journaled in the standard E, whereas the plate C is journaled inthe standard E. Each of these standards is provided at one side onlywith a pair of lugs H, spaced apart as shown very clearly in Fig. 3, andsupported by said lugs in order to lock or release the boring-barrel isany suitable means. The preferred means employed for this burposecomprises a bar 2 passing through holes .3 formed in said lugs.inthelower end of each of; these bars, is a lever 5 having its upper end preferably bifurcated sshown at 6. The outer portions 7 of thebifurcated end 6, of each lever 5, is eccentric to the pin 4, and whenthe said levers'are in the position illustrated in Figs. 1 and 2, theyco-act with the adjusting nuts 8, screwed on the upper threaded end ofeach bar 2 so as to grip the plates B and C in their respective.standards in order to positively lock the boring-barrel in adjustedposition. 7

a A plurality.v of bars 9 are mounted in alined holes 10 formed in theplates B and C, and the .said bars are suitably locked in place. Eachbar 9 is of course provided with, a suitable cutter;

10 represents the chuck, and the axis of Plvoted by a pin 4tv rotationof the same is-tliatof the spindle. (not shown) and this axis ofrotation is represented by the line 11.. It willibe observed that theline 11 passes centrally longitudi nally through the bar 12; ittherefore follows that the bar in the position just identified is theone that supports the working cutter. l

The boring-barrel together with its bars, is very heavy, and some meansmust be used to readilymove the same so. as to position the requiredcutter. My preferred means for this purpose comprises a ratchet plate13, secured by any suitable means such as screws 14 to the outer face ofthe plate C of the boring-barrel'A. 15 is a'lever mounted on the stud16, which stud is held. inthe ratchet plate. A pawl 17' is pivoted tothe lever 15, and co-acts with the ratchet plate 13",to permit-theboring barrel A to be moved. i

Mounted in the ratchet-platelSarea plurality of bushings 18, preferablytapered, and the axes of these bushings'are so located that whenthelocating pin 19 is moved thereinto, the cutter bar carrying thecutterto do work, will be absolutely positioned with. its longitudinal axis inalinement with the axis of 'the'spindle. The end' 20of the pin 1.9'i'stapered so as to facilitate-entry thereof into the bushings 18. Ithreaded'in the bracket 21, and is preferably provided with a'hand-wheel 22 for ease and speed of manipulation.-

It will of course be understood that the boring-barrelA must be unlockedto permit of the movement thereof, and prior to this movement, thelocking pin 19=must be with V drawn from its bushing: After properlocation of the desired bar 9-, the boringbarrel is then firmly lockediTo'prevent longitudinal displacement o the boring-barrel, any suitableconstruction may be employed. In order to provide avery'simple means-forthis purpose, I'provide the plate B with an annular'peripheral flange23- which is housed within' the annular groove 24: formed in-one sideofthestandard' E; The ratchet plate 13 is of greater diameter thantheplate G, and'thereforesince this ratchet plate operates against theouterface of the standardE, it will'be clear that displaced." 7

While any desired number of bars -9 'may said boring-barrel will 'not belongitudinally be used, Iprefer to usefthr-ee, because thereby Ii mountin the one boring-barrel the necessary number-of cutters required,andat' the same time secure themaximum distance betweenthe bars 9 toprevent the-same coming-in contact-with the head of the lathe.

1 Theba-rs '9=are-m-ade very strong, andwhile 'they'ha ve considerableoverhang: in respect of the boring-barrelA, still 'by reason of thefact'that they are given very firm Thepin 19 is support in the saidboring-xbarrel,thererwill be no undesirable movement in the cutters.

My turret embraces the single-bar idea with its rigidity, with'the addedadvantage O fsfl' plurality of bars possessing the same rigidity andimmediately available for use in respect .of consecutive operations,this saving much time and trouble, and insuring accuracy in work;

I find that the use of three cutter-bars, spaced substantially onehundred and twenty degrees'apart, and ofcoursewith their longitudinalaxes at the same distance from the center of rotation of the rotarymember supportingbthe same, gives meample room between the'bars sothatparticu larly in respect of the'boring of shells, I am enabled to havethe desired clearance for thehandling of' the work without the necessityof'having to move the carriage as far away from the'chuck as wouldbenecessary if thecutter-bar's'were not grouped as stated; this is animportant feature of my invention;

While I have described whatI consider to be the best embodiment of myinvention, I 9 desire it to be understood that the principle may beembodied in-many different forms within the terms of my claims and yetavoid" the prior art.- Y Gla-imsz 1.1A- turret comprising arotar-y'member provided with a plurality of horizontalholes therethroughto receive cutter-bars; bearing=locking means in whichsaid mem her ismounted to rotate on a horizontal axis, and whereby-said member islocked, and an indexing device whereby-the cutter carried by said memberto be i put to work is readily accurately located prior to thelockingofsaid'member. i I

2. A turret comprising 'a rotary member" provided with a plurality ofhorizontal holes therethrough to receive cutter-bars; a pair of splitstandards, spaced" apart, iniw-hich: the said'rotarymember is mounted torotate 011,3 horizontal axis an indexing-device whereby the cuttercarried -biy said member" to be put; to werkis readily accuratelylocated; and means whereby said rotary mem berlocked in said] standardssubsequent totheuseof said" indexing *means; A 3; A turret comprisingrotary memberi provided with a plurality of*horizontal holes 1therethrough to receive cutter-bars; a pair .of splitstandards,spacedapart, in -which 1 20 saidrotary'memberis mounted torotate on 'a horizontal axis; the--said standards being each providedwith a pair 'of' lugs attheir split sides; an indexing device wherebythecutter carried'by said 'member-to beput to work is readilv accuratelylocated, and means carried by the said pairs of lugs whereby said rotarymember is locked; in said standards subsequent-to the use-ofsaidindex'ing means. I 1

4. A turret comprising a rotary member provided with a plurality ofhorizontal holes therethrough to receive cutter-bars; a pair of splitstandards spaced apart in which the said rotary member is mounted torotate on a horizontal axis; an indexingdevice comprising aratchet-plate secured to one end of said rotary member adjacent theouter side of one of said standards, and provided with a plurality ofholes suitably located corresponding to the number of cutter-barscarried by said rotary member; a locating pin; a bracket in which saidlocating pin is mounted to operate; the said loeating-pin co-acting withthe holes in said indexing-plate for the purpose specified; a leverpivoted to said ratchet-plate; a pawl pivoted to said lever andco-acting with said ratchet-plate to turn said rotary member, and meanscarried by each of the said split Copies oi this patent may be obtained.101-

standards whereby said rotary member is locked therein.

5. A turret comprising a boring-barrel formed of a hub provided at eachend with a plate, one of said plates being provided-at its outer edgewith an annular peripheral flange, the said plates being provided with aplurality of alined holes; a pair of standards spaced apart carried by asuitable support, one of said standards being provided with an annulargroove in which operates the peripheral flange carried by one of saidplates since the said plates are designed to be mounted in saidstandards so as to operate on a horizontal axis, and means attached toone of said plates and operating against the outer side of itsassociated standard to prevent longitudinal displacement of saidboring-barrel.

FRED MoRAE BAWDEN.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

